Tag Archives: Oxygen Absorbers for pharmaceuticals

Fresh Meat
March 20, 2015


Many foods are very sensitive for oxygen, which is responsible for the deterioration of many products either directly or indirectly. In fact, in many cases food deterioration is caused by oxidation reactions or by the presence of spoilage aerobic microorganisms. Therefore, in order to preserve these products, oxygen is often excluded. Oxygen presence in food packages is mainly due to failures in the packaging process, such as mixture of gases containing oxygen residues, or inefficient vacuum. Vacuum packaging has been widely used to eliminate oxygen in the package prior to sealing. However, the oxygen that permeates from the outside environment into the package through the packaging material cannot be removed by this method.

 

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February 13, 2015


Oxygen Absorbers are small packets that contain an iron powder. These packets are made of a material that allows oxygen to enter but does not allow the iron powder to leak out. When an oxygen absorber packet is removed from its protective packaging, the Oxygen molecules & moisture in the surrounding atmosphere begins to permeate into the iron particles inside of the absorber packets. Available moisture activates the iron, and it oxidizes to form iron oxide. Typically, there must be at least 45% relative humidity in the surrounding atmosphere before the rusting process can begin. To assist in the process of oxidation, sodium is added to the mixture. Sodium acts as a catalyst, or activator, causing the iron powder to be able to oxidize even with relatively low humidity.

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